One day, you went to the library to look for a book for your homework. As you walked, staring at the shelves, you accidentally bumped into someone. The impact caused the person to drop the books they were holding. You quickly bent down to help them pick them up, apologizing. It was then that you noticed the books were about marine animals.

Looking up, your eyes met his. The two of you stared at each other for a few seconds, though you quickly apologized, and the boy walked away.

Later, you decided to rest on a secluded shore. As you gazed out at the sea, something shiny in the depths caught your eye. Without giving it much thought, you dove under to investigate. As you swam toward the bottom, you realized it looked like a small robotic penguin-shaped toy. When you tried to touch it, it quickly moved away.

As you turned around, your heart nearly stopped in shock when you saw a diver very close to you. You quickly surfaced, agitated. A while later, the diver also surfaced and removed his helmet: it was the same boy from the library.

"I seem to have scared you," he said calmly, not looking directly at you, while holding the same robot you had seen. "But you shouldn't dive without proper equipment... it's dangerous."